Rubbing machine



July 12, 1 938. o. A. KEHLE l RUBBING MACHINE Filed Nov. '7. 19:54

2 Sheets-Sheet 2 1 N VE N TOR.

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BY I

/ l v ATTORNEY. 1

.Patented July 12, laas vPn'laNT ori-ICE 2,123,426 RUBBING MACHINE Ottmar A. Kehle, Detroit, Mien., assigner to sterling Products Company,

poration of California Detroit, Mich., a cor- Application November 7, l1934, SerialrNo. 751,838

My invention relates to a new and useful improvement in a rubbing machine adapted for use in rubbing various surfaces. and from the description of the invention it will be noted that 6 the invention may also be used 'for abrading.

" It is an object of the present invention to provide in a rubbing machine of this class a rubbing member associated with actuating mechanism so arranged and constructed that the rubbing mem- 10 ber may be reciprocated while remaining in a single plane. It is another object of the present invention to provide in arubbing machine o f this class mechanism whereby the rubbing element may be reciprocated by means of a rotating shaft.

It is another `object of the present invention to provide in a rubbing machine of this class a rubbing memberI associated with mechanism whereby the rubbing member may be reciprocated through the medium of an electric motor.

Another object of the invention is the provision of a rubbing machine of this class in which a rotating cam may be utilized to effect a reciprocation of the rubbingmember.

Another object of the invention is the provision in a rubbing machine of this class of means for easily and quickly attaching a pad in position for supporting the rubbing medium.

Another object of the invention is the provision of means for mounting a supporting pad in such a manner' that it may be reciprocated bodily and retained in a constant plane and maintained free from flexing.

Another object of the vinvention is the provision in a rubbing machine of this class of a supporting handle whereby the machine may be held free from shocks and vibrations.

Another object of the invention is the .provision in a rubbing machine of a mechanism in which there is an actuating part adapted for reciprocating a supporting part so constructed and arranged that a pad supported thereon may be reciprocated through delivery of force to the supporting part, while'at `the same time the pad will be maintained free from twisting strains or force.

Other objects will appear hereinafter.

The invention will be best understood by a reference to the accompanying drawings which form a part of the specification and in which,

Fig. 1 is a central longitudinal vertical sectional 50 view of the invention with a part broken away.4

Fig. 2` is a sectional view taken on 'line 2-2 of Fig. l.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a fragmentary longitudinal vertical s claims. (ci. 51.-170) sectional view of a modified form of the invention.

r Fig. 5 is a view taken on line 5-5 of Figfi and reduced in size.

Fig. 6 is a fragmentary longitudinal sectional view of a further modied form of the invention. Fig. 7 is a View taken on lin-e 1-1 of Fig. 6

slightly reduced.

Fig. 8 is a'central longitudinal vertical sectional view of a further modified form of the invention.

Fig. 9 is a sectional view taken on line 9--9 of Fig. 8.

Fig. 10 is a fragmentary side elevational view of afurther modified form with parts broken away and parts shown in section.

Fig. 11 is a sectional view taken on line II--Ii of Fig. 10.

Fig. 12 l l. side elevational view with parts broken away and parts shown in section of a further modified form.

Fig. 13 is a sectional view taken on line l3-I3 of Fig. 12. A

In the drawings I have shown several forms of rubbing pads, and in the forms shown in Figs. 1 to 6, inclusive, the pad in itself is of a well known type and is merely illustrated to show the adaptation of the other mechanism to a pad of this class or type of construction.

In the form shown in Fig. 1, I provide a base 2l, on which is suitably mounted a housing 22. Mounted on the housing 22 is a handle 23 which projects outwardly at one end from a cross-head 24. rI'he end of the handle and the cross-head are slitted at 25 and extending outwardly from opposite sides of the handle arethe arms 26 and 21 which are adapted to embrace the housing and clamp a layer 28 of rubber or other yieldable material thereon upon a threading of the nut 29 on to the bolt 30. This provides a convenient handle whereby the mechanism may be held in use, and due to the manner of mounting and the construction of the handle the vibrations of the machine transmitted to the hands of the operator are reduced to a minimum. i

Projecting outwardly from one end of the housing 22 is a neck 3| threaded on which is the connecting fitting 32 in which is threaded the screw 33 having its inner end reduced and engaging in the peripheral groove 34 formed inthe connecting shaft 31. This connecting shaft 31 is connected to a flexible shaft 36 which it is intended to rotate by means of an electric motor. A protective sleeve or sheathing is mounted on the outer end of the fitting 32 and serves to enclosey the flexible shaft 36. The inner end of the connecting shaft 31 is provided with a socket 31' in `which :er 44 engages in the peripheral spirally directed groove 46 formed in the operating shaft 88. This groove. when the shaft 28 is being rotated, serves as a cam groove for electing reciprocationof the sleeve 42 .and the screw 48. This screw 43 is provided with the extension 46 which projects through the opening 41 formed in the upper side of the flexible supporting pad 48 which is preferably made from rubber. This pad 48 is mounted by means of the bolt 48 on the base 2|. tom of the pad is connected to the top 48 by means of the ribs or partitions 6|. Mounted on the upper surface of the bottom 68 is aplate 62 I having a guide sleeve 62, in which the extension of 42 slidably engages. Formed in the sides of the pad is a groove 54 in which a resilient locking member 55 may serve to retain the edges of av -layer 66 of emery cloth or other suitable rubbing or abrading material. 'I'he layer 66 serves to cover the cushion layer 66 which is glued to the outer .from a soft yieldable material.

. In operation when the flexible shaft 36 is rotated the actuating shaft 38 will be rotated, and this will eifect a reciprocation of the extension 46 so as to reciprocate the bottom 5|). The end walls of the supporting pad are sufficiently flexible to permit this reciprocating movement. In the form shown in Fig. 4 I-have provided a method of mounting the pad wherebyl the pad may be easily and quickly removed from the base 2| and replaced thereon. Mounted on the base 2| is a layer 51 formed'preferably from spring metal. The opposite edges of the plate 61 are turned inwardly to provide the inwardly directed flanges 68 which were designed to interlock with the inwardly directed flanges 69 formed on the opposite ends of the plate 69 which is attached to the top 48 of the pad. Formed on one of the flanges 68 is the outwardly .projecting tongue 6|. These flanges are struck on an arc, as clearly appears on Fig. 5, and when it is desired to mount the pad in position the extension 46 of the screw 48 is engaged in the guide sleeve 53 while the pad extends angularly to the plate 2|. The pad is then rotated into position, thus interlocking the flanges 58 and 69.

In Fig. 6 and Fig. 7, I have shown a slightly dif- .ferent form in which there is provided a retaining bead 62 at the opposite ends of the plate 2|-,

and this bead 62 is adapted to interlock with the inwardly turned flanges 68 formed on the plate 64 which is attached to the top 48 of the pad. An outwardly projecting tongue 66 is. formed on one end of the plate 64. As shown in Fig. 'l the pad is again mounted in position by a swinging. movement referred to in the description relating to Fig. 4 and Fig. 5.

In the form of pad shown in Fig. 1 to Fig. 6,1m-

clusive, when the reciprocating action is transmitted to the pad, the outer or rubbing surface of the pad will swing in an arc until it is flattened out through contact with the surface to be rubbed. In other words, this outersurface will curl inwardly at its ends. This results from forming the The botpad integral with the supporting structure and from fastening the pad at its upper end. Con'- sequently, when the outer or rubbing surface of unequal pressure will be transmitted to the surface at different points.

This is an undesirable feature of rubbing machines of this kind and maybe avoided in the two ways which I havel illustrated herein. In the forms shown in Fig. 10 and Fig. 12 a bodily reciprocation of the pad is eifected without necessarily effecting a distortion of the supporting.

means. In the forms shown in Fig. 8, the pad is reciprocated while remaining in a single plane and the pad is free from any strains tending to twist it, bend it, or swing it in an arc. In this form I provide as a part of the actuating mechathe pad engages the face of the bodyto berubbed,

nism, loops 66 which are formed from resilient material and which are connected to the plate 2| by means of the clamping plate 61 and the bolts 68. The lower ends of these loops are connected to the plate 1| by the clamping plate 68 and the bolts'` 18. The plate 1| is provided with the recess or groove 12 in which may engage the spring band 18 which serves to clamp the covering I6 over the cushion 58 which is glued to or otherwise secured to the under-sinface of the plate 1|. 'The guide sleeve 68 is carried by the plate 88, and the screw extension 46 projects into the sleeve Il. 'I'he screw extension 48 is provided with a head 246 which engages in the guide sleeve II and is 'prevented from withdrawaltherefrom by the inwardly turned flange 282 on the end of the guide sleeve 68'. As clearly shown in Fig. 9, the screw head 246 in normal position is spaced from the flange A2,88. When the reciprocating action takes place, the loops 66 will be distorted out of their normal lshape, but the plate 1| will move in a single plane.

This plate 1| is flexible as is likewise the cushion 66', so that while these parts move in a plane and' as well as a different type of pad. In this form I' provide a rectangular preferably flexible band 14 secured to the top 15 'of whichis a metal plate 18.

. Through this plate 16 the screw 11 projects. This screw threads into the sleeve 42 and the sleeve 42 embraces the operating shaft 39 as shown in Fig. l.` Threaded on the screw 11 is a nut 18 which serves to clamp the washer 19 against the plate 16. The cushion pad 66' is retained in position by the layer 56 of emery cloth, sand paper, or the like, which is retained in position by the spring retaining loop or band 80. The'construction is such that as the screw 11 is reciprocated the entire structure 14 reciprocates bodily.

In the form shown in Fig. l2 I have shown a substantially similar type of mounting as that shown in Fig. 10, excepting that there is rotatably mounted rollers 8| which are adapted to engage the plate 16. In this form the plate 16 is providedv with the upwardly turned .flanges 82 to which may be attached a dust shield 82.

It is believed obvious from the various forms illustrated that a mechanism is thus provided which will accomplishl the object sought.

While I have illustrated and described the preferred forms of construction I do not wish to limit myself to the precise details of structure shown, but desire to avail myself of such variations and modifications as come within the scope of the appended claims. y

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. lin a rubbing machine' of the class described an actuating mechanism; a housing for enclosing sald mechanism; a detachable handle mpunted on said housing; and a yieldable layer of shoci: absorbing material between said handle and said housing.

2. `lin a rubbing machine of the class described an actuating mechanism; a housing for enclosing said mechanism; a detachable handle mounted on said housing; a yieldable layer of shock absorbing material between said handle and said housing; means for mounting said handle onsaid housing in clamping relation thereto.

3. in a rubbing machine oi the class described a supporting structure; a retaining plate mounted on said structure having the opposite ends struck on an arc; an'inwardly projecting flange on the opposite. ends vof said plate; a rubbing pad; a retaining plate mounted on said pad; inwardly projecting arcuate flanges on said last mentioned plate engageable with the flanges on the :first mentioned plate for mounting said pad on said structure. Y l

4; In a rubbing machine of the class described a supporting structure; a retaining plate mounted on said structure having4 the opposite ends struck on an arc; an inwardly projecting ange A plate engageable with the flanges on the ilrst mentioned plate for mounting said pad on said structure; and means on one of said plates lorA manually effecting relative rotation oi said plates for disengaging the same irom each other.

5. In a rubbing machine of the class described, a rubbing pad; a supporting structure; a plurality of fiat resilient strips doubled upon themselves to provide loops; means for connecting said loops on said supporting structure with the outer face of said loops engaging said supporting structure; means for connecting said rubbing pad to said loops diametrically opposite the connection of said loops to said supporting structure and in engagement with the outer face thereof, said loops retaining said pad connected 'to and in spaced relation to said Isupporting structure, the curvature oi said loops extending outwardly toward opposite ends oi said pad.

6. In a rubbing machine of the class described, a rubbing i a supporting structure; a pluralityV oi dat resilient strips doubled upon themselves to provide loops; means for connecting said loops on said supporting structure with the outer face of said loops engaging said supporting structure; means for connecting said rubbing pad to said loops diametrically opposite the connection of said loops to said supporting structure and in engagement with the outer face thereof, said loops retaining said pad connected to and in spaced relation to said supporting structure, the curvature oi said loops extending outwardly toward opposite-ends of said pad; and an' actuating mechanism mounted on said supporting structure for reciprocating said pad relatively to said supporting structure longitudinally of said 

